Florimond datioht



UNTTED STATE@ @FETCH FLORIMON) DATICHY, OF PARIS, FRANCE.

APPARATUS FOR REWORKING THE WASTE STEAM OF STEAlVI-ENGINES.

Specification of Letters Patent No. 27,532, dated March 20, 1860.

To all whom 'it may concern:

Be it known that l, FLonruoND DATICHY, now of the city of Paris, in theEmpire of France, have made a certain new and useu ful discovery orInvention for Utilizing and Reworking the Exhaust- Steam of Steam-Engines and other Heated Gas or Vapor; and I hereby declare that thefollowing is a full and clear description therof.

The nature of my invention consists in the employment of certain meansor apparatus or their equivalents, for utilizing the waste or exhauststeam, heated gas, or vapor, of steam and other engines, in a mannerheretofore unknown.

By this my invention or improvement, the exhaust steam from a steamengine is made to pass successively into two dist-inet reservoirs eachof which is situated in a tank or cistern containing water that isconstantly kept at a temperature different from that of thesteam. Theexhaust steam is thus orfirst exposed to a partial condensation, orconverted into a misty state when it is acted upon by pumps or suction,and then forced in this state into a worm arranged in the flues at ornear the fire-chamber of the boiler furnace, where registers or valvesare disposed to regulate at pleasure the degree of heat communicated tothe cworm or worms. At this moment a strong steam jet is injected intothe worm whereby the tension of the exhaust steam contained in thelatter is increased and said steam violently driven or forced into theboiler or boiler tubes where it is utilized or reworked, a vacuum orpartial vacuum being at the same time formed in the pump cylinders, andthe suction effected by the effect of the steam blast into the worm.Such description will serve to illustrate in a general way how myinvention may be carried into practice, and to enable others how to makeand use the same.

I will now proceed to describe in detail a suitable apparatus foraccomplishing it, reference being had to the accompanying drawing inwhichM Figure l, represents a vertical view partly in elevation andpartly in section of such an apparatus; Fig. 2, a plan view of the same;and Fig. 3, a view of details, detached.

The steam generated in the boiler after having performed its duty in thesteam cylinder (A) of an engine, is passed through a pipe into acylindrical reservoir or chamber (B). This reservoir or chamber issituated in a square tank or cistern (C) containing or filled withVwater kept at a constant temperature of about 85 degrees centigrade. Tomaintain or regulate this temperature, steam and cold water are used,the former being passed directly from the boiler, and the latter beingsupplied and diffused by a water sprinkler (Z9) which is connected withthe feed pipe of the boiler. This sprinkler is arranged so as to causethe water to fall in a shower upon the upper surface of the reservoir(B) and from thence to pass through the orifices (o) into the cistern Bythis means not only is the water in the tank or cistern kept at a giventemperature, but the reservoir itself is preserved from overheating.

The exhaust steam upon entering the reservoir (B) will, it is evident,be partially condensed, whereby the exhaust or escape of the steam fromthe cylinder (A) will be greatly facilitated. This partially condensedsteam is next conveyed, by means of a pipe into a second reservoir (B)also surrounded by or situated in a tank like the former reservoir. Thewater surrounding this latter reservoir (B) is at a temperature somewhathigher than that of the water surounding the other, say 88 degreescentigrade, or such a temperature that, while it will evaporize suchportion of the steam as is more or less liquefied, will constitute astarting point for the overheating or reheating and giving new tensionto the exhaust steam. While in this state, the exhaust steam is rapidlydrawn from the reservoir (B and forced into two worms or coils of pipeslodged in the flue near the lire box of the furnace This is done bymeans of pumps (D) and pipes (c and CZ) the pumps being geared with andoperated by the engine. ln these coils the pressure of the steam isconsiderably increased by the action of the heat to which the coils areexposed, the heat being regulated at pleasure to any degree suiicient tocomplete the regeneration of the steam, by means of register valvesarranged and operating to more or less close the openings between thelire box and the flues, and whereby the contact of the worms with theflame or products of combustion is increased or decreased at pleasure.'A steam jet is now introduced from the boiler through the pipes andcocks (Gr) into the worms or coils. So sudden and extreme a mixturecauses the tension of the superheated steam in the coils to be stillmore increased, and likewise causes said steam to be driven through thetubes (c) into the boiler or boiler tubes (Gr) and, in so doing,necessarily produces a vacuum or partial vacuum which will clear thepump cylinders and the several tubes connected with them from steamcontained in them. In this way the exhaust steam (that was) is returnedto the boiler and placed in a condition to be used over again in thesteam cylinder (A) of the engine as it was originally employed and to doits original duty, after which and when escaping as exhaust steam again,it is passed as before to the apparatus for utilizing and reworking it,and whereby the regeneration of the steam may be indefinitely repeatedwithout much or any material additional expense of fuel or power.

The several tubes or pipes in the apparatus hererepresented anddescribed, are all, or most of them provided with cocks for regulatingthe admision and escape or passage of the fluids or vapors they areemployed to conduct. The reservoir (B) is also provided at its top ordome shaped cover with a pipe and cock (76,) for the free escape ofsteam whenever it is necessary to discharge the apparatus after use.When this is don-e, the working of the pumps being unnecessary, theVeccentric operating them is disengaged by merely turning the screwswhich loosens and disconnects the eccentric from the pump rod. A gage(p) is used to indicate the extent of vacuum produced in the apparatusand a pipe serves to establish direct communication, when required,between the exhaust steam pipe (a) and the second reservoir (B) to heat,to the desired degree, the water surrounding it. Another tube (t)furnished with a cock, is applied to the apparatus whereby it may becleansed by merely introducing water instead of steam through the pumps.This is done at the start of the operation, when the boiler is filledand fed by thus forcing water instead of steam direct into the boiler.

When the engine is started, it is necessary to commence by clearing theseveral pipes and tubes of air that they may contain. For this purposethe plungers of the pumps are made hollow and have at their lowerextremities clock valves for the suction of air which is forced througha small tube communicating with the interior and that may be closed by acock with which it is provided.

Having thus described my invention and the manner in which the same maybe carried into effect, I would observe that I do not confine myself tothe particular construction and arrangement of parts herein set forth,as the apparatus admits of numerous .modifications or applicationswithout affecting the principle of my invention. Thus, instead of a wormor coil of pipes (E) tubes or pipes may be used and arrangedlongitudinally in fines running against the boiler. The pumps too may bevaried in character and number; likewise the reservoirs and their tanks.Air may be substituted for water in the tanks to effect the condensationas described; and the apparatus generally may be applied to enginesdriven by heated or other gas or vapor than steam.

I claiml. The method herein described of utilizing or reworking theexhaust steam or other escaping gas or vapor of an engine, by subjectingit first to a partial condensation and afterward applying heat toevaporate its liquefied products, and then injecting it, after itstemperature and elasticity have been increased, in the form of steam orvapor into the boiler, for use over again as specified.

2. The employment of separate reservoirs maintained at differenttemperatures to receive successively the exhaust steam, gas or vapor ofthe engine, and operating first to partially condense the steam andafterward to evaporate its liquefied products and to increase itstemperature and elasticity prior to its return to the boiler there to bereworked essentially as herein set forth.

3. The employment, in combination with the exhaust steam receivingreservoir or reservoirs above named, of a worm or coil of pipes, orother suitable heater, arranged in close proximity to the boilerfurnace, for increasin the tension of the exhaust steam prior to itsreturn in a vaporous form to worked essentially as herein set forth.

4. Passing the exhaust steam in a vaporous form from its receivingchamberor reservoir to the worm or heater, by means of pumps or theirequivalents essentially as described.

5. Causing a jet of steam from the boiler or of working pressure to beinjected into the worm or heater to raise the tension of the exhauststeam, and to drive it into the boiler and control the suction of thepumps employed in supplying the heater with exhaust steam, substantiallyas herein set forth.

In testimony whereof I have signed my name to this specification beforetwo subscribing witnesses.

DATICHY.

Witnesses GEO. HUT'roN, S. REINARD.

